Uncommon Therapeutics YC Application

Winter 2025Active

Uncommon Therapeutics went through Y Combinator in the Winter 2025 batch as a Healthcare company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Winter 2025
Industry: HealthcareTherapeutics
Team size: 2
Status: Active
Launched: 2025

Founders

Noah AuerhahnFounder
Ryan LimFounder

What Uncommon Therapeutics does

Our founder Noah, an experienced tech entrepreneur, was directly impacted by a severe genetic disease when his daughter was diagnosed with Rett Syndrome, a disease that afflicts 1 in 10,000 girls. Using an innovative polytherapy strategy, we’ve successfully improved her quality of life, and have designed new therapeutics that each could be worth billions and together could deliver a cure.

Uncommon Therapeutics's YC application, reconstructed

Y Combinator application

Uncommon Therapeutics, Winter 2025 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Uncommon Therapeutics

Describe what your company does in 50 characters or less.

A Disease Focused Biotech, Building Multiple Billion Dollar Drugs

What is your company going to make? Please describe your product and what it does or will do.

We design gene therapies using a polytherapy approach to treat rare genetic diseases like Rett Syndrome. Our treatments improve patients' quality of life and aim to deliver cures by addressing multiple disease mechanisms.

Where do you live now, and where would the company be based after YC?

We live in San Francisco, CA, and the company would remain based here after YC.

Explain your decision regarding location.

San Francisco has the biotech ecosystem and talent we need. We're already here full-time and close to the patients and partners we work with.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Uncommon Therapeutics YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Uncommon Therapeutics's public data (launch notes, founder backgrounds, product description). It shows how a company like Uncommon Therapeutics would present itself to YC, not the text they submitted.